Valve.



E. FALCKE.

VALVE.

APPLICATION FILED 001226, 19101 1,048,816. Patented 1390.31, 1912.

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COLUMBIA PLANOGIAPN C0., WASHINGTON. D. C.

B. FALGKE.

y VALVE. APPLICATION riLnD 00T. 2s, 1910.

YPatented Dec. 31', '1912.

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COLUMBIA PLANOORAPM n..WASmNuTON. D.' c

^ urn TATES PATENT OFFTCE.

EMIL FALCKE, OF DRESDEN, GERMANY, ASSIGNOR TO SCHERL MONORAIL COMPANY, OF JERSEY CITY, NEW JERSEY, .A CORPORATION OF NEW JERSEY.

VALVE.

Speeicaton of Letters Patent.

Application Ied October 26, 1910.

Patented Dee. 31, 1912. Serial No. 589,102.

To all whom t may concern.'

Be it known that I, EMIL FALCKE, a subject of the German Emperor, residing in the city of Dresden, Germany, have invented certain new and useful Improvements in Valves, of which the following is a specification, reference being had to the accompanying drawings, forming a part hereof.

This invention relates to the construction of valves which are adapted to open or to close simultaneously either partly or wholly the inlet and the outlet at opposite ends of a power cylinder for the admission of fluid under pressure on one side of the piston in the cylinder and the simultaneous discharge of the fluid from the cylinder on the other side of the piston for the purpose of producing a pressure differential.

The object of the invention. is to improve the construction of such valves and particularly to render them exceedingly sensitive in operation so that a very slight movement of the movable valve body will be sufficient to increase the pressure at one end of the cylinder and to decrease the pressure at the other end, or vice versa, while the passages for the fluid may also be opened more or less widely according to the external resistance to the movement of the piston or the velocity of the piston or both.

The improved construction has been devised with special reference to its use in connection with servomotors, such as are employed for the regulation of turbines and for the control of the force applied to gyrostats in the application of gyrostats to the equilibrating of bodies in unstable equilibrium.

The invention will be more fully explained hereinafter with reference to the accompanying drawings in which it is illustrated, and in which- Figure 1 is a view in section of a servomotor cylinder with its piston to which the improved valve is applied, the plane of section being indicated by the line 1-1 of Fig. 2. Fig. 2 is a view of the valve casing in section on the plane indicated by the line 2 2 of Fig. 1, the sleeves andthe movable valve bodies being removed. Fig. 3 is a view in section on the plane indicated by the line 3-3 of Fig. l, the sleeves being in position while the movable valve bodies are removed. Figs. 4 and 5 are detail side and edge views of one of the movable valve bodies, showing also the shaft upon which both are mounted.

In Fig. 1 of the drawings is shown a cylinder a with a piston b having a piston rod b through which the movement of the piston may be imparted to the gyrostat or other body which is to be moved by the servomotor. The cylinder is provided at its ends with ports a and a2 through which the fluid under pressure may be admitted or discharged as the piston is moved in one direction or the other. Suitably connected with the cylinder a is a valve casing c which is provided with an inlet port c for connection with the source of fluid under pressure and with a discharge opening c2 for the return of the fluid to its source or its discharge elsewhere. The casing c, in the construction shown, has a substantially cylindrical bore c which is divided centrally by a partition o* and the ends of the casing are closed by suitable caps Z and d, thus forming two separate chambers within the casing. Through the caps and through the central partition c1 is extended a shaft e which carries themovable valve bodies hereinafter referred to and may be oscillatcd by any suitable connections for the purpose of changing the position of the valve bodies.

For convenience in manufacture, especially for the formation of the passages hereinafter referred to, as well as to permit the renewal of the wearing surface when required, there is tightly secured in the bore c3 of the valve casing c, at each side of the partition wall c4, a sleeve f or f. T he sleeve f is provided with a port f2 for registration with the port c in the casing, constituting a supply port, and with ports and ft, constituting delivery ports. Slmilarly the sleeve f is provided with a port f5 for registration with the port c2 of the casing, constituting a discharge port, and with ports f and f7, constituting receiving ports. In the wall of the casing yc are formed a channel c, which forms a passage for the fluid from the port f3 to the port a2; a channel c", which forms a passage for the fluid from the port f4 to the port a; a channel o7, which forms a passage for the fluid from the port a to the port f; and a channel 08 which forms a passage Jfor the fluid from the port a2 to the port f7. The channels o5, c, 07 and 08 are distinct, one from another, being formed by internal ribs of the casing c which tit tightly upon the sleeves f and f.

Upon the shaft e are secured two movable valve bodies g and g. These two movable valve bodies are similar in construction and description and illustration oi one will sui'- ice for both. To a hub g2 adapted to be secured to the shaft e are secured end plates g3 which support gates g4 g4 and g5 g5. The gates g4 g4 are diametrically o-ppcsite and cooperate with the ports f3, while the gates g5 g5 are also diametrically opposite and cooperate with the ports f4, but the gates g4 g5 are oppositely placed wit-h their opposite proximate edges offset, so that as the ports f3, are closed the ports f4 are opened by a continued movement of the movable valve body in the same direction, and vice versa. The gates of the two valve bodies are similarly positioned, so that as the ports 3 and f6 are opened, the ports f4 and 'f7 are closed by a movement of the valve bodies in the same direction, and vice versa.

1t will now be seen that when the two valve bodies. are so positioned as to admit fluid under pressure through the inlet port c and the port a at the upper end of the cylinder a, the lower end of the cylinder a is placed in communication with the port a2 and with the outlet o2, and that when the valve bodies areso positioned as to admit Huid under pressure through the inlet 0, the port f4 and the port a2, to the lower end of the cylinder, the upper end of the cylinder is in communication through the port a and the port f7 with the outlet or discharge opening 02.

1t will be observed that the improved valve is perfectly balanced and that the slightest movement thereof in one direction or the other from the middle position increases the pressure of the Huid at one end of the cylinder and decreases the pressure at the other end of the cylinder, as the case may be and that, the gates g4 and g5 being properly positioned with respect to the corresponding ports f3 and f4, and f6 and f7, as the case may be, there is no overlap and consequently no dead position which would require a substantial movement of the valve bodies from their middle position in order to effect the desired movement of the piston o, the opposite, proximate edges of the gates g4 and g5 being offset by a distance preferably a little less than the width of the ports f3 and f4, although the same result might be secured by placing the opposite, proximate edges of the gates g4 and g5 in alinement and olfsetting the ports f3 and f4 and f6 and f7 correspondingly.

The form and arrangement of the parts obviously may be varied to suit diiierent conditions of use and the invention, therefore, is not restricted to the precise construction shown.

I claim as my invention:

1. The combination of a valve casing having a supply port and delivery ports with separate channels, and a movable valve body within the casing having gates to cooperate with the delivery ports respectively, the gates and the delivery port-s being relatively offset, whereby one of the ports is closed as the other is opened.

2. The combination of a valve casing having a cylindrical bore with a supply port and delivery ports with separate channels, and a rotary oscillating valve body within the casing having gates to cooperate with the delivery ports respectively, the gates and the delivery ports being relatively offset, whereby one of the ports is closed as the other is opened.

3. rlhe combination of a valve casing having two separate chambers, one chamber having an inlet port and delivery ports with separate channels and the other having a discharge port and receiving ports with separate channels, and movable valve bodies within the chambers respectively, each of such valve bodies having gates to cooperate with the corresponding delivery ports and receiving ports, the gates and thecoperat- Ving ports in each chamber being relatively oiset, whereby one of the delivery ports and one of the receiving ports are closed as the other of the delivery ports and the other of the receiving ports are opened.

4. The combination of a valve casing having two separate cylindrical chambers, one chamber having an inlet port and delivery ports with separate channels, and the other having a discharge port and receiving ports with separate channels, rotary oscillating valve bodies within the chambers respectively, each of such valve bodies having gates to cooperate with the corresponding delivery ports and receiving ports, the gates and the cooperating ports in each chamber being relatively oii'set, whereby one of the delivery ports and one of the receiving ports are closed as the other of the delivery ports and the other of the receiving ports are opened. p

5. The combination with a cylinder having ports in its ends, of a valve casing having separate chambers, one of said chambers having an inlet' port and delivery ports communicating respectively with opposite ends of the cylinder, and the other of said chambers having a discharge port and receiving port-s communicating respectively with opposite ends of the cylinder, and movable valve bodies within the chambers respectively, each of such valve bodies having gates to cooperate with the corresponding delivery ports and receiving ports, the gates and the coperating ports in each chamber being relatively ofset, whereby one of the delivery ports and one of the receiving ports are closed as the other of the delivery ports and the other of the receiving ports are opened.

6. The combination with a cylinder having port-s in its ends, of a valve casing hav ing two separate cylindrical chambers, one chamber having an inlet port and delivery ports communicating with opposite ends of the cylinder respectively and the other having a discharge port and receiving ports communicating with opposite ends of the cylinder respectively and rotary oscillating valve bodies within the chambers respectively, each of such valve bodies havingY gates to coperate with the corresponding delivery ports and receiving ports, the gates and the coperatin ports in each chamber being relatively olset, whereby one of the delivery ports and one of the receiving ports are closed as the other of the delivery ports and the other of the receiving ports are opened.

This specification signed and witnessed this 11th day of October, A. D. 1910.

EMAIL FALCKE.

Signed in the presence of- PAUL ARRAS, PAUL Vom/1ER.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents. Washington, D. C. 

